Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only flag readOnlyHint=false and destructiveHint=false; the description goes well beyond them by disclosing the billing model (first hour from credits, then hourly), the exact prerequisites, the permission scope (servers:create), the account/MCP-key requirement, and the single-use 10-minute token flow. This is the full behavioral picture an agent needs before spending money.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with the create action and the non-destructive guarantee, then prerequisites and the two-step flow. Dense but every clause earns its place; the only waste is '[SPENDS MONEY]', which duplicates the title's '(spends money)' warning.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description correctly states what each step returns (price and token, then launch) and points to gpucloud_get_server for follow-up status. Prerequisites, cost, permissions, and the confirmation workflow are all covered, leaving no gap for a costly mutation tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3, but the description adds real semantics the schema cannot express: the meaning of calling with versus without confirmationToken (price quote + token vs. actual launch). It does not explain the optional 'name' parameter, but the token flow is the semantically important part.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a precise verb and resource ('Creates a NEW server ... from an AVAILABLE backup') and immediately scopes it with 'the original server is not changed', which cleanly separates it from gpucloud_restore_server (in-place) and gpucloud_create_server (from scratch). The GPU-model/region inheritance is spelled out, so no schema inspection is needed to understand what gets created.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives concrete preconditions (canLaunch, saved card, one hour of credits, budget and key caps) and the two-step call sequence, plus polling via gpucloud_get_server. The contrast with gpucloud_restore_server is implied by 'the original server is not changed' rather than named, so the agent must infer which sibling to pick for an in-place restore.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.